Java tutorial
/* * Copyright 2016 Stanislav Pintjuk * E-mail: stanislav.pintjuk@gmail.com * * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package com.launcher.silverfish.launcher.appdrawer; import android.content.ClipDescription; import android.content.DialogInterface; import android.content.Intent; import android.net.LinkAddress; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v7.app.AlertDialog; import android.text.InputType; import android.util.Log; import android.view.DragEvent; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.animation.AlphaAnimation; import android.widget.EditText; import android.widget.FrameLayout; import android.widget.Toast; import com.launcher.silverfish.R; import com.launcher.silverfish.common.Constants; import com.launcher.silverfish.common.Utils; import com.launcher.silverfish.launcher.LauncherActivity; import com.launcher.silverfish.models.TabInfo; public class TabbedAppDrawerFragment extends Fragment { //region Fields private View rootView; private TabFragmentHandler tabHandler; // Are we swapping tabs? This will be consumed by the tab.onClick event private boolean isSwappingTabs; private TabInfo swappingTab; private int swappingTabIndex = -1; //endregion //region Android lifecycle @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { rootView = inflater.inflate(R.layout.activity_app_drawer, container, false); tabHandler = new TabFragmentHandler(getChildFragmentManager(), rootView, getActivity()); addOnClickListener(); setOnDragListener(); return rootView; } @Override public void onResume() { super.onResume(); tabHandler.loadLastOpenTab(); } @Override public void onStop() { super.onStop(); tabHandler.saveLastOpenTab(); } //endregion //region Tab options: rename, remove, add private void promptTabOptions(final TabInfo tab, final int tab_index) { AlertDialog.Builder builder = new AlertDialog.Builder(getContext()); // Set up tab options CharSequence[] options = new CharSequence[] { getString(R.string.text_rename), getString(R.string.text_move_tab), getString(R.string.text_remove), getString(R.string.text_add_tab) }; // add click listener builder.setItems(options, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { switch (i) { case 0: promptRenameTab(tab, tab_index); break; case 1: prepareMoveTab(tab, tab_index); break; case 2: removeTab(tab, tab_index); break; case 3: promptNewTab(); break; } } }); builder.show(); } private void promptNewTab() { AlertDialog.Builder builder = new AlertDialog.Builder(getContext()); // Set up the dialog builder.setTitle(getString(R.string.text_new_tab_name)); // Set up the input final EditText input = new EditText(getContext()); // Specify the type of input expected input.setInputType(InputType.TYPE_CLASS_TEXT); builder.setView(input); // setup the buttons builder.setPositiveButton(getString(R.string.text_add_tab), new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { try { tabHandler.addTab(input.getText().toString()); } catch (IllegalArgumentException e) { // This means that the tab name was empty. showToast(R.string.text_cannot_name_empty); } } }); builder.setNegativeButton(getString(R.string.text_cancel), new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { dialogInterface.cancel(); } }); builder.show(); } private void removeTab(TabInfo tab, int tab_index) { try { tabHandler.removeTab(tab, tab_index); } catch (IllegalArgumentException e) { // This means that the user wanted to remove the first tab showToast(R.string.text_cannot_remove_tab); } } private void promptRenameTab(final TabInfo tab, final int tab_index) { // Find which tab we're renaming String tabName = tab.getLabel(); AlertDialog.Builder builder = new AlertDialog.Builder(getContext()); builder.setTitle(String.format(getString(R.string.text_renaming_tab), tabName)); // Set up the input final EditText input = new EditText(getContext()); // Specify the type of input expected input.setInputType(InputType.TYPE_CLASS_TEXT); builder.setView(input); // Set up the buttons builder.setPositiveButton(getString(R.string.text_rename), new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { try { tabHandler.renameTab(tab, tab_index, input.getText().toString()); } catch (IllegalArgumentException e) { /* This means that the user entered an empty name */ showToast(R.string.text_cannot_name_empty); } } }); builder.setNegativeButton(getString(R.string.text_cancel), new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.cancel(); } }); builder.show(); } private void prepareMoveTab(final TabInfo tab, final int tabIndex) { isSwappingTabs = true; swappingTab = tab; swappingTabIndex = tabIndex; showLongToast(R.string.text_move_tab_toast); } private void endMoveTab(final TabInfo tab, final int tabIndex) { if (swappingTabIndex != tabIndex) { try { tabHandler.swapTabs(swappingTab, swappingTabIndex, tab, tabIndex); } catch (IllegalArgumentException e) { // This means that the user wanted to remove the first tab showToast(R.string.text_cannot_move_tab); } } else { showToast(R.string.text_operation_cancelled); } consumeMoveTab(); } private void consumeMoveTab() { isSwappingTabs = false; swappingTab = null; swappingTabIndex = -1; } //endregion //region Listeners private void addOnClickListener() { tabHandler.setOnTabButtonClickListener(new AppDrawerTabFragment.TabButtonClickListener() { @Override public void onClick(TabInfo tab, int position) { if (isSwappingTabs) { endMoveTab(tab, position); } // Don't add an else clause, so we also update the tab position to refresh the apps tabHandler.setTab(position); } @Override public boolean onLongClick(TabInfo tab, int position) { promptTabOptions(tab, position); return false; } }); } private float dragOffsetX, dragOffsetY; private void setOnDragListener() { rootView.setOnDragListener(new View.OnDragListener() { @Override public boolean onDrag(View view, DragEvent dragEvent) { switch (dragEvent.getAction()) { case DragEvent.ACTION_DRAG_STARTED: { // Care only about DRAG_APP_MOVE drags. ClipDescription cd = dragEvent.getClipDescription(); if (!cd.getLabel().toString().equals(Constants.DRAG_APP_MOVE)) return false; // Starting movement, drag offset is now reset to 0 dragOffsetX = 0; dragOffsetY = 0; // Show the uninstall indicator showUninstallIndicator(); break; } case DragEvent.ACTION_DRAG_ENTERED: { // Don't do anything break; } case DragEvent.ACTION_DRAG_LOCATION: { // getX() and getY() now return relative offsets, // so accumulate them to get the total movement dragOffsetX += dragEvent.getX(); dragOffsetY += dragEvent.getY(); // If drag is on the way out of this page then stop receiving drag events int threshold = Constants.SCREEN_CORNER_THRESHOLD; // Get display size int screen_width = Utils.getScreenDimensions(getActivity()).x; if (dragEvent.getX() > screen_width - threshold) { return false; } else { // Check if the drag is hovering over a tab button int i = tabHandler.getHoveringTab(dragEvent.getX(), dragEvent.getY()); // If so, change to that tab if (i > -1) tabHandler.setTab(i); } break; } case DragEvent.ACTION_DROP: { String appName = dragEvent.getClipData().getItemAt(0).getText().toString(); // If app is dropped on the uninstall indicator uninstall the app if (Utils.onBottomCenterScreenEdge(getActivity(), dragEvent.getX(), dragEvent.getY())) { launchUninstallIntent(appName); } else { // If the user didn't move the application from its original // place (too much), then they might want to show a menu with more options float distSq = (dragOffsetX * dragOffsetX) + (dragOffsetY * dragOffsetY); if (distSq < Constants.NO_DRAG_THRESHOLD_SQ) { showExtraOptionsMenu(appName); } else { // Retrieve tha drop information and remove it from the original tab int appIndex = Integer .parseInt(dragEvent.getClipData().getItemAt(1).getText().toString()); String tabTag = dragEvent.getClipData().getItemAt(2).getText().toString(); removeAppFromTab(appIndex, tabTag); // add it to the new tab String app_name = dragEvent.getClipData().getItemAt(0).getText().toString(); dropAppInTab(app_name); } } break; } case DragEvent.ACTION_DRAG_ENDED: { // Just hide the uninstall indicator hideUninstallIndicator(); break; } } return true; } }); } //endregion //region Uninstall indicator private void showUninstallIndicator() { // Get the layout FrameLayout uninstall_indicator; uninstall_indicator = (FrameLayout) rootView.findViewById(R.id.uninstall_indicator); // Make it visible uninstall_indicator.setVisibility(View.VISIBLE); // And start the animation AlphaAnimation animation = new AlphaAnimation(0.0f, 1.0f); animation.setDuration(500); uninstall_indicator.startAnimation(animation); } private void hideUninstallIndicator() { FrameLayout uninstall_indicator; uninstall_indicator = (FrameLayout) rootView.findViewById(R.id.uninstall_indicator); uninstall_indicator.setVisibility(View.INVISIBLE); } private void launchUninstallIntent(String package_name) { Uri packageUri = Uri.parse("package:" + package_name); Intent uninstallIntent = new Intent(Intent.ACTION_UNINSTALL_PACKAGE, packageUri); startActivity(uninstallIntent); } //endregion //region Apps moving private void removeAppFromTab(int appIndex, String tab_tag) { // Retrieve tab fragment android.support.v4.app.FragmentManager fm = getChildFragmentManager(); AppDrawerTabFragment fragment = (AppDrawerTabFragment) fm.findFragmentByTag(tab_tag); // Remove app and refresh the tab's layout fragment.removeApp(appIndex); } private void dropAppInTab(String app_name) { // Retrieve tab fragment android.support.v4.app.FragmentManager fm = getChildFragmentManager(); TabInfo tab = tabHandler.getCurrentTab(); AppDrawerTabFragment fragment = (AppDrawerTabFragment) fm.findFragmentByTag(tab.getTag()); // Add app and refresh the tab's layout fragment.addApp(app_name); } //endregion //region Extra options per app private void showExtraOptionsMenu(final String appName) { AlertDialog.Builder builder = new AlertDialog.Builder(getContext()); // Set up extra menu options CharSequence[] options = new CharSequence[] { getString(R.string.add_to_home_screen) }; // Add click listener builder.setItems(options, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { switch (i) { case 0: LauncherActivity activity = (LauncherActivity) getActivity(); activity.addShortcut(appName); activity.moveToScreen(1); break; } } }); builder.show(); } //endregion //region UI private void showToast(int stringId) { Toast.makeText(getContext(), getString(stringId), Toast.LENGTH_SHORT).show(); } private void showLongToast(int stringId) { Toast.makeText(getContext(), getString(stringId), Toast.LENGTH_LONG).show(); } //endregion }